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Vishay General Semiconductor - Diodes Division SMBJ43CA-E3/52
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- Part No.:
- SMBJ43CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43CA-E3/52.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,555
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Product details
Overview
SMBJ43CA-E3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤69.4 V at 8.6 A peak surge current - used for protecting MOSFETs, sensor interfaces, and industrial I/O lines against ESD and inductive switching surges.
For engineers reviewing the SMBJ43CA-E3/52 datasheet, SMBJ43CA-E3/52 pinout, SMBJ43CA-E3/52 application, or SMBJ43CA-E3/52 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.37), MSL Level 1 moisture sensitivity, RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the 100 °C/W junction-to-ambient thermal resistance requires careful PCB copper pad design for sustained surge handling.
The device meets ANSI/IEEE C62.35 standards for transient suppressors and delivers sub-nanosecond response time to clamp fast-rising transients. It is rated for repetitive 0.01% duty cycle surges and supports operation from –55 °C to +150 °C junction temperature, with no marking on the case to indicate polarity - consistent with bidirectional device convention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal swing range for protected line. |
| VBR (min/max) | 47.8 V / 52.8 V at 1 mA - guaranteed breakdown threshold window; ensures predictable turn-on across manufacturing lot and temperature. |
| VC @ IPPM | ≤69.4 V at 8.6 A - clamping voltage under 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 600 W - peak pulse power handling capacity; defines transient energy absorption limit per event. |
| ID @ VWM | ≤1.0 µA - reverse leakage at stand-off voltage; critical for low-power sensor or battery-backed circuits. |
| TJ max. | +150 °C - maximum junction temperature; sets upper limit for thermal design margin in high-ambient environments. |
| Package | SMB (DO-214AA) - standardized 2-pin surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with JEDEC J-STD-020 MSL Level 1. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no cathode/anode marking; symmetrical terminal geometry. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, with whisker resistance per JESD 201 Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient conduction path | Either terminal serves as anode or cathode depending on instantaneous polarity; enables AC-line or differential-signal protection without orientation constraints. |
| Cathode Band (absent) | Polarity indicator | Not present - confirms bidirectional functionality; eliminates risk of incorrect orientation during placement. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports robust protection against IEC 61000-4-5 Level 3 surges (1 kV/2 Ω) on 24 V industrial buses without derating. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on protected ICs - e.g., keeps microcontroller I/O pins below absolute maximum rating during 8.6 A surge. |
| MSL Level 1, peak reflow 260 °C | Enables single-pass lead-free reflow without baking or special handling; reduces manufacturing cost and process complexity. |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage drift over 10+ years in automotive or industrial deployments. |
| RoHS-compliant, matte tin terminations | Guarantees solderability and intermetallic reliability in high-volume automated assembly with SnPb- or SAC305-compatible processes. |
Applications
| Industrial PLC Analog Input Protection | Automotive Body Control Module (BCM) CAN Bus Protection |
|---|---|
|
Use Scenario: Protects 0–10 V analog input channels in programmable logic controllers from field-wiring induced transients and ground-loop surges. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, responding within <1 ns to limit excursion beyond ±69.4 V. Use Value: Prevents ADC saturation and op-amp latch-up during 1 kV/500 Ω surge events, maintaining measurement integrity without system reset. |
Use Scenario: Shields high-speed CAN FD transceivers in body control modules from load-dump and jump-start transients in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Differential-line TVS connected across CANH–CANL, clamping common-mode surges while preserving signal integrity up to 5 Mbps. Use Value: Maintains bus communication continuity during ISO 7637-2 Pulse 5a (75 V/100 ms) events, avoiding ECU error frames or bus-off states. |
| Consumer Appliance Motor Driver I/O Protection | Telecom DSL Line Interface Surge Suppression |
|
Use Scenario: Safeguards GPIO and enable lines of BLDC motor drivers in washing machines and HVAC systems from inductive kickback during relay or MOSFET switching. IC Role / Device Role / Timing Role: Localized TVS mounted adjacent to driver IC inputs, absorbing 600 W pulses generated by 100 mH coil de-energization. Use Value: Eliminates need for external RC snubbers or optocouplers, reducing BOM count and PCB area while meeting IEC 61000-4-4 Level 4 immunity. |
Use Scenario: Installed on xDSL line cards to protect ADSL/VDSL transceivers from lightning-induced surges entering via outdoor copper pairs. IC Role / Device Role / Timing Role: First-stage protector in hybrid surge suppression circuit, shunting >90% of 10/700 µs telecom surge energy before gas discharge tube activation. Use Value: Extends transceiver MTBF by limiting junction stress to <69.4 V during 10 kV open-circuit surges, complying with GR-1089-CORE Section 4.4.2.2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA-M3/52 | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package; same VWM, VBR, and PPPM. | Required where halogen-free compliance is mandated (e.g., EU public infrastructure tenders); no change in layout or performance. | Select when environmental compliance exceeds commercial RoHS requirements; otherwise, E3 suffices for general industrial use. |
| SMCJ43CA-E3/52 | Same VWM and VBR, but in larger SMC (DO-214AB) package with 1500 W PPPM; RθJA = 50 °C/W vs. 100 °C/W. | Suitable for higher-energy surge environments (e.g., outdoor telecom cabinets) where PCB space allows larger footprint. | Choose only if 1500 W rating is required and board area permits 7.11 mm × 6.22 mm SMC outline; not drop-in compatible with SMB layout. |
Compared with SMBJ43CA-E3/52, the M3 variant offers identical protection performance with halogen-free materials, while the SMCJ43CA-E3/52 provides 2.5× higher surge power in a non-interchangeable package - making SMBJ43CA-E3/52 optimal for space-constrained, cost-sensitive industrial and consumer designs requiring 600 W capability.
Availability
SMBJ43CA-E3/52 is available at Aetrix Electronics and suitable for industrial PLC analog inputs, automotive BCM CAN bus protection, consumer appliance motor driver I/O, and telecom DSL line interface applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ43CA-E3/52 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series is engineered for high-reliability transient suppression in harsh environments - targeting industrial automation, automotive subsystems, and communications infrastructure where consistent clamping behavior and MSL-1 manufacturability are mandatory.
FAQ
What is the clamping voltage of SMBJ43CA-E3/52 at its rated peak pulse current?
The SMBJ43CA-E3/52 clamps to a maximum of 69.4 V at its peak pulse current (IPPM) of 8.6 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry downstream will not experience voltage excursions exceeding this level during specified surge events. The clamping voltage is confirmed in the Electrical Characteristics table on page 2 of Vishay document 88392.
Is SMBJ43CA-E3/52 suitable for bidirectional signal line protection?
Yes, SMBJ43CA-E3/52 is explicitly designed for bidirectional protection, as indicated by the "CA" suffix and confirmed in Vishay's documentation: "For bidirectional devices use CA suffix (e.g. SMBJ10CA). Electrical characteristics apply in both directions." Its symmetrical VBR min/max (47.8–52.8 V) and absence of cathode band marking validate its suitability for AC-coupled, differential, or floating signal paths such as RS-485, CAN, or audio interfaces.
Does SMBJ43CA-E3/52 meet automotive qualification standards?
The base SMBJ43CA-E3/52 is commercial-grade and not AEC-Q101 qualified; however, Vishay offers the automotive variant SMBJ43CAHE3_B/H (or HM3_B/H) with identical electrical specs plus AEC-Q101 qualification. Per ordering information on page 3 of document 88392, HE3/HM3 suffixes denote AEC-Q101 compliance - so SMBJ43CA-E3/52 itself is intended for industrial and consumer applications unless upgraded to HE3/HM3 part numbers.
What is the thermal resistance and recommended PCB layout for SMBJ43CA-E3/52?
SMBJ43CA-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Maximum Ratings table. To maintain surge capability, designers must implement these minimum pad dimensions and avoid excessive trace length or thermal isolation. The thermal resistance directly impacts sustained surge repetition rate and must be verified in thermal simulation for high-duty-cycle applications.
How does the leakage current of SMBJ43CA-E3/52 affect low-power sensor circuits?
SMBJ43CA-E3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 43 V stand-off voltage (VWM), measured at 25 °C. This ultra-low leakage ensures minimal loading on high-impedance sensor outputs (e.g., thermistors or bridge amplifiers), preserving accuracy and battery life in always-on monitoring systems. Leakage remains below 5 µA up to +125 °C, supporting reliable operation in extended-temperature industrial nodes.
SMBJ43CA-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 8.6A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ43CA-E3/52 FAQ
1.How can I place an order for SMBJ43CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43CA-E3/52 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMBJ43CA-E3/52 reliable?
The price and inventory of SMBJ43CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ43CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43CA-E3/52?
SMBJ43CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43CA-E3/52 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMBJ43CA-E3/52?
For technical support, including SMBJ43CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43CA-E3/52 requirements.
6.How does Aetrix verify that SMBJ43CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ43CA-E3/52 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMBJ43CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ43CA-E3/52?
All SMBJ43CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43CA-E3/52, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMBJ43CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ43CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43CA-E3/52 Tags
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